That's a kneeded eraser as Jabba. Not a lot of effort into him, so don't judge him too harshly.

This image comes from the Star Wars Technical Commentaries site. It's a mural that actually IS mounted in the sail barge.

"Yes, I can SEE you're serving drinks." In lieu of the palace, I included the infamous trapdoor here for all Jabba's monster-feeding needs. You can see it here.

Here's a shot of the figures I threw together for this, my first custom mini work on Leai there. I'm no Robert by any stretch of the imagination, but I wanted the figures to illustrate just how fun and dynamic this set could be.